About Keystone Compliance

Temperature Testing

Temperature Test Capabilities at Keystone Compliance

Keystone Compliance offers temperature testing and temperature & humidity testing in chambers ranging from small bench top to large drive-in systems. Our largest chamber has inside dimensions of 12’ wide x 15’ long x 10’ tall and an 8’ x 9’ door. However, we have created custom oversized temperature chambers to accommodate much larger devices including cars, drones and large pieces of machinery. If you have a large unit, we can likely find a way to test it. Keystone Compliance is capable of moving, installing, and testing multiple rack assemblies. Our other large walk in temperature test chamber is equipped with twin 30 hp compressors and is capable of temperature transition rates exceeding 20 degrees Celsius per minute. This chamber permits temperature cycling testing on large items with aggressive transition times.

Temperature Test Lab Equipment at Keystone Compliance

We realize that temperature and temperature/humidity tests are the longest running tests in your testing program and we understand the importance of reliability of environmental chambers. No one ever wants to have a temperature test chamber malfunction on the 29th day of a 30 day test program. With our investment into new and up to date equipment, Keystone Compliance has done everything possible to reduce the risk to your temperature testing program including a temperature cycle test.

Keystone Compliance operates a number of different temperature and temperature/humidity test chambers. Chambers range in size from small bench top to large drive in systems. Temperature cycle test capabilities range from low temperature testing of -200 to high temperature testing to +500 degrees Celsius.

Keystone Compliance is capable of building customized temperature cycle testing chambers as needed to accomplish any environmental test parameters.

Temperature Testing Overview

Temperature testing, per MIL-STD 810 Methods 501.4, 502.4 and 503.4, tests an item’s ability to operate in extreme conditions. The testing can occur at a constant temperature exposure or a cyclic temperature exposure.

Constant Temperature Exposure

For constant temperature exposure, the test item is soaked until its temperature has stabilized and the test temperature is maintained for at least two hours following stabilization.

Cyclic Temperature Exposure

Cyclic temperature exposure has two procedures:

Procedure I – Storage. MIL-STD 810 states that the number of cycles for the storage test is set at a minimum of seven to coincide with the one percent frequency of occurrence of the hours of extreme temperatures during the most severe month in an average year at the most severe location. (The maximum temperature occurs for approximately one hour in each cycle.) When considering extended storage, critical materials, or materials determined to be very sensitive to high temperature, increase the number of cycles to assure the design requirements are met.

Procedure II – Operation. MIL-STD 810 states that the minimum number of cycles for the operational exposure test is three. This number is normally sufficient for the test item to reach its maximum response temperature. A maximum of seven cycles is suggested when repeated temperature response is difficult to obtain.

Temperature testing is just one of the climatics testing services we offer and our lab is fully equipped with the necessary equipment. Keystone Compliance is a temperature testing lab with significant experience with low temperature testing and high temperature testing. Contact us to discuss how we can help you meet your temperature test requirements.